@book { EntwicklungeinesexternenPersonalmarketingkonzepts,
    title = "Entwicklung eines externen Personalmarketingkonzepts",
    author = "Hans {Edenharder}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832421977",
    url = "https://m.diplom.de/document/218022"
}